syzbot has found a reproducer for the following issue on: HEAD commit: f3e8416619ce Merge tag 'soc-fixes-6.1-5' of git://git.kern.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=10e21467880000 kernel config: https://syzkaller.appspot.com/x/.config?x=d58e7fe7f9cf5e24 dashboard link: https://syzkaller.appspot.com/bug?extid=96cee7d33ca3f87eee86 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=116f8843880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11646857880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/628abc27cbe7/disk-f3e84166.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2f19ea836174/vmlinux-f3e84166.xz kernel image: https://storage.googleapis.com/syzbot-assets/f2e1347e85a5/bzImage-f3e84166.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/d38a9877608a/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+96cee7d33ca3f87eee86@xxxxxxxxxxxxxxxxxxxxxxxxx ====================================================== WARNING: possible circular locking dependency detected 6.1.0-rc8-syzkaller-00035-gf3e8416619ce #0 Not tainted ------------------------------------------------------ syz-executor145/3632 is trying to acquire lock: ffff88801981bb58 (&mm->mmap_lock#2){++++}-{3:3}, at: __might_fault+0x8f/0x110 mm/memory.c:5644 but task is already holding lock: ffff88807288d220 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1108 [inline] ffff88807288d220 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_fiemap+0x101/0x180 fs/ntfs3/file.c:1243 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->ni_lock/4){+.+.}-{3:3}: lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668 __mutex_lock_common+0x1bd/0x26e0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799 ni_lock fs/ntfs3/ntfs_fs.h:1108 [inline] attr_data_get_block+0x301/0x2370 fs/ntfs3/attrib.c:917 ntfs_file_mmap+0x48c/0x730 fs/ntfs3/file.c:387 call_mmap include/linux/fs.h:2204 [inline] mmap_region+0xfe6/0x1e20 mm/mmap.c:2622 do_mmap+0x8d9/0xf30 mm/mmap.c:1412 vm_mmap_pgoff+0x19e/0x2b0 mm/util.c:520 ksys_mmap_pgoff+0x48c/0x6d0 mm/mmap.c:1458 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&mm->mmap_lock#2){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain+0x1898/0x6ae0 kernel/locking/lockdep.c:3831 __lock_acquire+0x1292/0x1f60 kernel/locking/lockdep.c:5055 lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668 __might_fault+0xb2/0x110 mm/memory.c:5645 _copy_to_user+0x26/0x130 lib/usercopy.c:29 copy_to_user include/linux/uaccess.h:169 [inline] fiemap_fill_next_extent+0x22e/0x410 fs/ioctl.c:144 ni_fiemap+0xf57/0x1130 fs/ntfs3/frecord.c:1934 ntfs_fiemap+0x134/0x180 fs/ntfs3/file.c:1245 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x187f/0x29a0 fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x83/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->ni_lock/4); lock(&mm->mmap_lock#2); lock(&ni->ni_lock/4); lock(&mm->mmap_lock#2); *** DEADLOCK *** 1 lock held by syz-executor145/3632: #0: ffff88807288d220 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1108 [inline] #0: ffff88807288d220 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_fiemap+0x101/0x180 fs/ntfs3/file.c:1243 stack backtrace: CPU: 0 PID: 3632 Comm: syz-executor145 Not tainted 6.1.0-rc8-syzkaller-00035-gf3e8416619ce #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 check_noncircular+0x2cc/0x390 kernel/locking/lockdep.c:2177 check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain+0x1898/0x6ae0 kernel/locking/lockdep.c:3831 __lock_acquire+0x1292/0x1f60 kernel/locking/lockdep.c:5055 lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668 __might_fault+0xb2/0x110 mm/memory.c:5645 _copy_to_user+0x26/0x130 lib/usercopy.c:29 copy_to_user include/linux/uaccess.h:169 [inline] fiemap_fill_next_extent+0x22e/0x410 fs/ioctl.c:144 ni_fiemap+0xf57/0x1130 fs/ntfs3/frecord.c:1934 ntfs_fiemap+0x134/0x180 fs/ntfs3/file.c:1245 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x187f/0x29a0 fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x83/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f84c755aca9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdcb203e18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f84c755aca9 RDX: 0000000020000040 RSI: 00000000c020660b RDI: 0000000000000006 RBP: 00007f84c751a2b0 R08: 0000000000000000 R09: 0000000000000000
